Nondisjunction Is the Failure of Homologous Chromosomes to Separate During

Nondisjunction is the failure of homologous chromosomes to separate during meiosis I, or the failure of sister chromatids to separate during meiosis II or mitosis. As a result, both homologous chromosomes or both sister chromatids migrate to the same pole of the cell. This produces daughter cells with an imbalance of chromosomes. If 18 pairs of sister chromatids segregate normally during meiosis II in cats (n=19) but we have nondisjunction of 1 pair, then at the end of meiosis II we will have

A) 3 cells with 20 chromosomes and 1 cell with 18.
B) 2 cells with 20 chromosomes and 2 cells with 18.
C) 2 cells with 19 chromosomes, 1 with 20, and 1 with 18.
D) 3 cells with 18 chromosomes and 1 cell with 20.